Abstract: The subject of the present invention is the sensor for the impedance measurements of the biological or chemical factor sample in the potentiostat system comprising the reference electrode RE and counting electrode CE with the electric contacts leading to the edge of the sensor in the form of the edge connector characterised in that it contains n working electrodes WEn, wherein n>2 and preferably n is in the range 2 to 256, and the reference electrode RE is common for all working electrodes WEn and the fragment thereof present by the working electrode WEn forms the measuring segment RE-CE-WEn. The subject of the invention is also the detection method of the chemical or biological factor in the sample using such a sensor.

Abstract: An optoelectronic foil comprising a substrate and a conductive layer comprising at least one oxide layer and at least one metal layer, wherein between the conductive layer and the substrate of the foil there is a barrier layer comprising at least one material selected from the group consisting of silicon oxides (SiOx), aluminium oxides (Al2O3, AlOxNy), titanium oxides (TiOx), silicon oxynitrides SiON, silicon nitrides (Si3N4, SiNx), organic silicon compounds (SiCxHy), zirconium oxide (ZrO2), hafnium oxide (HfO2), chromium oxides (CrO, Cr2O3, CrO2, CrO3, CrO5) and parylene.